ArrayList类removeRange()方法 (ArrayList Class removeRange() method)

• removeRange() method is available in java.util package.

  removeRange()方法在java.util包中可用。

• removeRange() method is used to remove the elements whose range is between st_in(start index) and en_in(end index) of this Arraylist. Here, st_in(inclusive) & en_in(exclusive).

  removeRange()方法用于删除范围在此Arraylist的st_in(开始索引)和en_in(结束索引)之间的元素。 在这里， st_in(含)和en_in(不含) 。

• removeRange() method is a non-static method so it is accessible with the class object and if we try to access the method with the class name then we will get an error.

  removeRange()方法是一种非静态方法，因此可以通过类对象进行访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• removeRange() method may throw an exception at the time of removing elements within the given range.

  removeRange()方法在删除给定范围内的元素时可能会引发异常。

  IndexOutOfBoundsException: This exception may throw when the given range does not exist.

  IndexOutOfBoundsException ：如果给定范围不存在，则可能引发此异常。

Syntax:

句法：

    public void removeRange(int st_in, int end_in);

Parameter(s):

参数：

• int st_in – represent the index of starting element to remove.

  int st_in –表示要删除的起始元素的索引。

• int en_in – represents the index of ending element to remove.

  int en_in –表示要删除的结束元素的索引。

Return value:

返回值：

The return type of this method is void, it returns nothing.

此方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example 
// of void removeRange() method of ArrayList
import java.util.*;
public class RemoveRangeOfArrayList extends ArrayList {
public static void main(String[] args) {
// Create an ArrayList with initial 
// capacity of storing elements
RemoveRangeOfArrayList arr_l = new RemoveRangeOfArrayList();
// By using add() method is to add 
// elements in this ArrayList
arr_l.add("C");
arr_l.add("C++");
arr_l.add("JAVA");
arr_l.add("DOTNET");
arr_l.add("PHP");
// Display ArrayList
System.out.println("ArrayList Elements :" + arr_l);
// By using removeRange() method is to remove the 
// element at index 2 and 3 like JAVA , DOTNET
arr_l.removeRange(2, 4);
// Display ArrayList 
System.out.println("arr_l.removeRange(2,4) : " + arr_l);
}
}

Output

输出量

ArrayList Elements :[C, C++, JAVA, DOTNET, PHP]
arr_l.removeRange(2,4) : [C, C++, PHP]

翻译自: https://www.includehelp.com/java/arraylist-removerange-method-with-example.aspx